Half to franiv ii



(No Model.)`

J. RBAGAN.

PIRE BRIDGE FOR vBOILER FURNAGES.

JAMES REAGAN, OF PHILADELPHIA,

PENNSYLVANIA, ASSIGNOR OF ONE- I 'IVALFA TO FRAN'K Il. FLEER, OF SAME PLACE.

FIRE-BRlDGE FOR BOlLER-FURNACES.

SPECIFICATION forming part of Letters Patent No. 589,909, dated. September 14, 1897.

Application led May 6, 1897. Serial No. 635,435. (No model.)

To all whom, t may concern:

zen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain newand useful Improvements in Fire-Bridges for Boiler-Furnaces; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use/the same, reference being had tothe accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to certain improvements on Letters Patent granted me under date of April 13, 1897, No. 580,506, in which a sectional bridge-plate provided withgrooves for the vlodgment of ashes and embedded in' similar substance to resist the action of heat is employed in boiler-furnaces. y

My present invention consists in constructing each section of the bridge in a hollow boxlike form, with receptacles on the upper surface, consisting of grooves or channels for ashes or other non-conductors of heat, and packing ,the interior of` same 'with' a similar substance. Owing to this peculiar form ation of the bridge and the fact that it is shielded from the lire it is rendered fireproof and will retain its normal position and shape in the furnace, avoiding all possibility of its becoming warped, twisted, or burned out.

The object ofimy present invention is to prepare these sections, forming the bridge proper for immediate use, so as to be handled like and take the place ofiire-brick, and by making them independenteach section can` be more readily and properly packed when detached from the furnace, and when required may be easily passed through the fire-door or other opening and set in position without the aid of skilled labor on the'horizontal plate at the rear end ofthe furnace at the junction of the combustion-chamber.

Reference is had to the accompanyingdrawings, in which-f y Figurel is a vertical' longitudinal section through the rear portion of a marine boilerfnrnace and part ofthe combustion-chamber, showing my invent-ion applied. Fig. 2 is a j transverse section through a furnace-tine, Be it known'that l, JAMES REAGAN, a citi-` showing the bridge extending across the saine. Fig. 3 isa vertical longitudinal division of the hollow lsection of the bridge which is placed at the front `adjacent to the tire. Fig. et is a rear open end view of the same through which the packing is introduced. Fig. 5 is a plan view of the lid or cover inclosing the same. Fig. 6 is a rear end View of one of the back sections. Fig. 7 is a longitudinal section of same. Fig. 8 is a perspective view of a portion of one ofthe sections,showingthegrooved upper surface and interior of saine.

The sections A and B, Figs. 1, 3, 4t, and G, are inclosed on five sides, forming a box or receptacle, with the remaining sides C and Ol, Figs. 3 and 7, made open, or partially so, Aand closed with a lid or cover D D', Figs. 5 and 7, forthe introduction of filling material. This material may consist of ashes, cinders, or any other. substance which is a non-conductor oi' heat, and is packed thoroughly within each section closely against the metal to prevent heat entering from below to destroy the bridge.

The upper surface of section A, Figs. l, 2, 3, and` 4:, which is inclined at any suitable angle to cause an upturn of the flame, is fur-A nished with a series of parallel grooves or channels E E toretain ashes and protect this port-ion vof the bridge from the action of the heat. The upper surface of section B, Figs. G, 7, and S, which is made fiat, is provided with grooves or chau n els E E similar to those of sect-ion A, so that ashes or cinders are allowed to accumulate over the surface of the bridge to shield the metal composing the Same from the action of the heat.

The sectionA, Figs. l and 2, is placed in front, adjacent to the lire, and is backed by section B to complete the bridge, the whole being supported by the plate F, Fig. l, which extends across the combristicii-chamber.

The sections A and B are packed, as stated, with ashes or other material which will not conduct heat previous to being placed in position within the furnace, and are provided on the abutting sides with tongues and grooves G G', Figs. 2, G, and 7, to retain them in line transversely across the rear end ofthe flue, the

small space between the bridge and the curve' IOO of the flue 1I, Fig. 2, on the right and left side being filled with lire-brick, if desired.

In 'filling` the sections A and I3 the covers D and D' are removed and the material packed in With a rammer, so as to thoroughly fill all the corners and leave no vacant places. After this is completed the covers are replaced and secured by means of tap-bolts L71', and are then ready for immediate use, and are simply dropped into place on the plate F without the aid of skilled labor or requiring any particular manipulation.

Having now particularly described and ascertained the nature of my invention and in what manner the same is to be performed, I declare that What I claim is- 1. A hre-bridge composed of the sections A and B, of box-like form having inclined and flat tops respectively, and grooves or channels E and E', formed therein, with the interior and grooves filled with ashes or other non-conductors of heat, substantially as and for the purpose speoiiied.

2. A lire-bridge composed of the hollow sections A and B, having` open ends C CQ and covers or lids D D, for the introductionvof ashes or other material, and grooves or channels E E, on the upper surface for the retention of ashes, substantially as specified.

The combination in a fire-bridge, of the hollow sections A and B, covers or lids D D', tap-bolts 7c, grooves or channels E E', tongues and grooves G and G', substantially as specified.

In testimony whereof I affix my signature in presence of two Witnesses.

JAMES REAGAN.

Vitn esses:

E. WARNER BoNsALL, F. G. IIULME. 

